One additional advantage of using pavior blocks over concrete slabs is that pavior blocks can be used to create a permeable surface so that there is less surface runoff – a big problem as more and more urban areas are covered with pavement.

So arch-thief Ahmad Kamakim climbed over into his saloon and, raising one of the marble slabs from the sunken part of the floor,94 dug a hole under it and laid the stolen things therein, all save the lanthorn, which he kept for himself.

Free running to thrash out your "issues" on cold urban slabs is part of the rise in individual "extreme sports," such as base-jumping (parachuting off buildings), mountain boarding, and freestyle biking.